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A policeman uses a radar gun to detect the speed of drivers in a 65 mph (29.06 m/s) zone. The gun uses sound waves with a frequency of 890 Hz. As one driver passes, the return wave has a frequency of 1050 Hz. What is the driver's speed? Is the driver breaking the speed limit?
The sodium D line is a doublet consisting of two wavelengths, 588.995 and 589.592 nm. Calculate the angular separation between these two lines in the first-order spectrum for a grating with 4000 lines per centimeter. Repeat for the second order.
Illustrate what is the maximum vertical displacement that he ball reaches during its trajectory?
A highway is to be built between two towns, one of which lies 30.0 km south and 83.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed?
What is the mass of sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2.
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.What is the frequency heard by the observer . What must be the result have been for the horizontal speed.
A hotel elevator ascends 200 m with maximum speed of 5m/s . Its acceleration and deceleration both have a magnitude of 1.0 m/s^2 . a.)How far does the elevator move while accelerating to full speed from rest?
An air puck of mass 0.029 kg is tied to the string and allowed to revolve in a circle of radius 2.0m on a frictionless horizontal surface. The other end of the string passes through a hole in the center of surface, and a mass of 2.6 kg is tied to it...
What is the amplitude of subsequent oscillations
The temperature inside the refrigerator is 2.0 °C. It stands in a kitchen whose temperature is 22 °C, what is the entropy change of the kitchen
evaluate what value of the distance d should a driver locate his car if he wishes to stay on a circular path without depending on friction?
What was the velocity of the bullet just before it struck the wooden block? The length of the string is 2 meters.
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